Aircraft Measurements of Aerosol Physical, Chemical and Optical Properties During ACE-1

9419475克拉克这个项目是南半球海洋气溶胶特性实验的一部分，该实验将于1995年在遥远的南太平洋进行，使用飞机、船上和地面测量各种化学物质、物理和气象参数，其中心目标是调查大气气溶胶的形成、演变和光学性质。在这一部件中，将在C-130飞机上安装各种仪器来测量气溶胶特性：热调节光学粒子计数器将用于评估较大光学活性气溶胶的粒度分辨成分，各种凝聚核计数器、超细凝聚核计数器，以及用于确定凝聚核尺寸光谱的差动迁移率分析仪、用于气溶胶散射系数的浊度计和用于气溶胶吸收系数的风速计。这项工作的目的是描述所研究区域的气溶胶辐射特性，并开发可导致对远程气溶胶及其辐射特性进行预测性了解和建模的工具。将讨论以下具体目标：建立可用于模拟气溶胶光学性质、辐射强迫和卫星辐射的气溶胶微物理、化学和光学参数之间的联系。检查细颗粒(如硫酸盐)和粗颗粒(如海盐)和相对湿度对当地和柱状气溶胶散射消光的贡献。发展对拉格朗日平流期间海洋边界层气溶胶演变形成过程的定量理解。查明对流层中层最近在原地和/或表面形成的气溶胶(海盐、尘埃、烟尘)的存在，并检查相关气团与环境过程和来源的关系。与ACE-1的其他参与者合作，将全球、区域和地方尺度上的气溶胶数据、激光雷达数据、气体前体等联系起来，以确定远程海洋气溶胶动态模型的关键参数和过程。

9419475 Clarke This project is part of the Southern Hemisphere Marine Aerosol Characterization Experiment (ACE-1), which will be conducted in the remote Southern Pacific in 1995 using aircraft, ship-board, and ground-based measurements of a wide variety of chemical species, physical and meteorological parameters with the central goal of investigating the formation, evolution, and optical properties of atmospheric aerosol. In this component, a variety of instruments will be deployed on the C-130 aircraft to measure aerosol properties: thermally conditioned optical particle counters will be used to assess size resolved composition of the larger optically active aerosol, various condensation nuclei counters, ultrafine condensation nuclei counters, and a differential mobility analyzer to determine the condensation nuclei size spectrum, nephelometers for the aerosol scattering coefficient, and an aethaelometer for the aerosol absorption coefficient. The objective of this work is to characterize aerosol radiative properties in the region studied, and also to develop tools that may lead to a predictive understanding and modeling of the remote aerosol and its radiative properties. The following specific objectives will be addressed: Establish a link between aerosol microphysical, chemical and optical parameters that can be used to model aerosol optical properties, radiative forcing and satellite derived radiance. Examine the contribution of fine particles (e.g. sulfate) and coarse particles (e.g. sea salt) and relative humidity to the local and column aerosol scattering extinction. Develop a quantitative understanding of the processes shaping evolution of the aerosol in the marine boundary layer during Lagrangian advection. Identify the presence of particles recently formed in situ and/or surface derived aerosol (sea salt, dust, soot) in the mid-troposphere and examine the relationship of associated air masses to environmental processes and sources. Work with other ACE-1 participants towa rd linking aerosol data, lidar data, gaseous precursors, etc. on global, regional and local scales to identify key parameters and processes for a dynamic model of remote marine aerosol.